The latest delay was first reported by the Wall Street Journal; a Samsung representative confirmed the pushback to Axios

Bixby Voice benefits from time to further enhance natural language understanding, and we are currently growing our user testing in the U.S. to prepare for launch. Key features of Bixby, including Vision, Home and Reminder, are available now.

Samsung didn't offer a new timeframe, but Spring runs through June 20, so it clearly won't be until after that point.